This method offers vastly superior speeds, lower latency, and greater reliability compared to traditional copper-based technologies like DSL and cable. To connect your fiber optic cable to a router, ensure you have the following: Fiber optic modem (ONT): Most fiber connections require an Optical Network Terminal (ONT), provided by your ISP. The ONT is linked to your router or gateway using an Ethernet cable. Many major ISPs, such as Verizon and Xfinity, offer fiber connections directly to your door, known as FttP or Fiber.